« previous next »

Author Question: Each entity type in an ER Diagram becomes an attribute. Indicate whether the statement is true or ... (Read 62 times)

Evvie72

  • Hero Member
  • *****
  • Posts: 519
on: Jul 7, 2018
Each entity type in an ER Diagram becomes an attribute.
 
  Indicate whether the statement is true or false

Question 2

Referential integrity specifies that the value of an attribute of one relation depends on the existence of the same attribute in another relation.
 
  Indicate whether the statement is true or false


fromAlphatoOmega22

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 7, 2018
Answer to Question 1

FALSE
Explanation: Each entity type in an ER Diagram becomes a relation, not an attribute.
CL

Answer to Question 2

TRUE
Explanation: For instance, you can't have StudentID in STUDENT_CLASS unless StudentID already exists in STUDENT.
CL


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Facultative Anaerobe Diagram Facultative Anaerobe Diagram
Disaccharides Diagram Disaccharides Diagram
Schematic Diagram of the fluidized bed for the experiment (CHE415 Unit Operations) Schematic Diagram of the fluidized bed for the experiment (CHE415 Unit Operations)
Lean 6 sigma - Fishbone Diagram - CAUSES & Effects OF LOW CUSTOMER SATISFACTION Lean 6 sigma - Fishbone Diagram - CAUSES & Effects OF LOW CUSTOMER SATISFACTION
Coolant flow through the impeller and scroll of a coolant pump for a V-type engine. Coolant flow through the impeller and scroll of a coolant pump for a V-type engine.
Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus). Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus).
Video: Dietary Cholesterol & LDL

For a complete list of videos, visit our video library